The virulence of A / Guangdong / Th005/ 2017(H7N9)influenza virus in poultry

doi:10. 3969 / j.issn.1005-4847. 2019. 05. 002

Home > Archive>Volume 27, Issue 5, 2019 >555-560. DOI:10. 3969 / j.issn.1005-4847. 2019. 05. 002

The virulence of A / Guangdong / Th005/ 2017(H7N9)influenza virus in poultry
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                        10. 3969 / j.issn.1005-4847. 2019. 05. 002
                    
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                        LYU QiLYU Qi
Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & ComparativeMedicine Center, Peking Union Medical Collage (PUMC);NHC Key Laboratory of Human DiseaseComparative Medicine; Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious;Beijing Engineering Research Center for Experimental Animal Models of Human Critical Diseases;Key Laboratory of Human Diseases Animal Model, State Administration of Traditional Chinese Medicine, Beijing 100021, China
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LI FengdiLI Fengdi
Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & ComparativeMedicine Center, Peking Union Medical Collage (PUMC);NHC Key Laboratory of Human DiseaseComparative Medicine; Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious;Beijing Engineering Research Center for Experimental Animal Models of Human Critical Diseases;Key Laboratory of Human Diseases Animal Model, State Administration of Traditional Chinese Medicine, Beijing 100021, China
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GONG ShuranGONG Shuran
Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & ComparativeMedicine Center, Peking Union Medical Collage (PUMC);NHC Key Laboratory of Human DiseaseComparative Medicine; Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious;Beijing Engineering Research Center for Experimental Animal Models of Human Critical Diseases;Key Laboratory of Human Diseases Animal Model, State Administration of Traditional Chinese Medicine, Beijing 100021, China
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QI FeifeiQI Feifei
Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & ComparativeMedicine Center, Peking Union Medical Collage (PUMC);NHC Key Laboratory of Human DiseaseComparative Medicine; Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious;Beijing Engineering Research Center for Experimental Animal Models of Human Critical Diseases;Key Laboratory of Human Diseases Animal Model, State Administration of Traditional Chinese Medicine, Beijing 100021, China
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WANG ShunyiWANG Shunyi
Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & ComparativeMedicine Center, Peking Union Medical Collage (PUMC);NHC Key Laboratory of Human DiseaseComparative Medicine; Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious;Beijing Engineering Research Center for Experimental Animal Models of Human Critical Diseases;Key Laboratory of Human Diseases Animal Model, State Administration of Traditional Chinese Medicine, Beijing 100021, China
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WANG GuanpengWANG Guanpeng
Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & ComparativeMedicine Center, Peking Union Medical Collage (PUMC);NHC Key Laboratory of Human DiseaseComparative Medicine; Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious;Beijing Engineering Research Center for Experimental Animal Models of Human Critical Diseases;Key Laboratory of Human Diseases Animal Model, State Administration of Traditional Chinese Medicine, Beijing 100021, China
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JIANG JingJIANG Jing
Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & ComparativeMedicine Center, Peking Union Medical Collage (PUMC);NHC Key Laboratory of Human DiseaseComparative Medicine; Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious;Beijing Engineering Research Center for Experimental Animal Models of Human Critical Diseases;Key Laboratory of Human Diseases Animal Model, State Administration of Traditional Chinese Medicine, Beijing 100021, China
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BAO LinlinBAO Linlin
Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & ComparativeMedicine Center, Peking Union Medical Collage (PUMC);NHC Key Laboratory of Human DiseaseComparative Medicine; Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious;Beijing Engineering Research Center for Experimental Animal Models of Human Critical Diseases;Key Laboratory of Human Diseases Animal Model, State Administration of Traditional Chinese Medicine, Beijing 100021, China
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Affiliation:(Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & ComparativeMedicine Center, Peking Union Medical Collage (PUMC);NHC Key Laboratory of Human DiseaseComparative Medicine; Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious;Beijing Engineering Research Center for Experimental Animal Models of Human Critical Diseases;Key Laboratory of Human Diseases Animal Model, State Administration of Traditional Chinese Medicine, Beijing 100021, China)
Clc Number:Q95-33
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Abstract:

Objective In 2017,a large number of poultry deaths occurred in several poultry markets, and H7N9avian influenza virus was isolated from the dead chickens. This study will track the tendency of the pathogenicity of H7N9virus and analyze the possible pathogenic mechanism. Methods The pathogenicity of the A/ Guangdong/ Th005/2017(Th005) and A/ Anhui/1/2013(Anhui) viruses were compared with the intravenous pathogenicity index (IntravenousPathogenic Index, IVPI) test in chickens. The body temperatures, body weights, and clinical symptoms of the chickens inthe infection groups were continuously measured post-infection. Meanwhile, pharyngeal swabs and cloacal swabs werecollected for viral titer determinations. Results Compared with the Anhui strain, the pathogenicity of Th005 wassignificantly increased in chickens. The IVPI score of Th005 reached 3 in avian. Th005 infected chickens caused asignificant decrease in body weight, body temperature increased above 42℃, and all died. However, the Anhui straincaused no obvious symptoms in chickens. The virulence of Anhui strain was further increased after circulated in chickens.Conclusions Th005 exhibits a high pathogenicity to poultry which may impair poultry industry and increase the existenceof viruses in the environment. Surveillance for the H7N9 influenza viruses, such as Th005, which had risen the virulence,should be stepped up.

Key words:H7N9 subtype avian influenza virus; chicken; pathogenesis

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Received:August 06,2019
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Online: November 04,2019
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